Lost my ACC fans yesterday on the way in to work and immediately began drawing heat with the temp. control wheel set to max. cool? My vehicle is a different model than yours.
In my case, fuse #5 affects the ACC blower. I pulled over and looked at it. Fuse did not appear to be blown. I replcaed it anyway. Wah-Lah...ACC blower fired up and the A/C was back.
You mentioned excess voltage. I wonder if perhaps the voltage regulator was/is the problem? Also went thru similar problem awhile back. ABS/SRS lights came on - cars idled poorly. Brushes in voltage regulator were worn. Replaced and that was the end of that.